Slava Pestov cca91797ed IRGen: Hollow out NecessaryBindings ...

This removes the "optimization" where a function type, metatype or
tuple type was split up into structural components, because it seems
that in general we need this structural type metadata again.

Similarly, this no longer tries to split up dependent concrete
conformances and instead passes the witness table in the context.

This makes the context larger potentially, but it avoids calls to
metadata access functions and swift_getWitnessTable() every time the
closure is invoked.

2023-03-28 19:21:45 -04:00

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